John Konstan Sturos

US Patent:

42666759, May 12, 1981

Filed:

Jan 4, 1980

Appl. No.:

6/109590

Inventors:

Robert D. Barwise - Bovey MN
John A. Sturos - Laurium MI
Douglas B. Brumm - Calumet MI

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

B07C 5342

US Classification:

209540

Abstract:

A process of separating wood chips according to their bark content by orienting them between a light source and light detector, measuring the amount of light transmitted through each chip, and separating the bark-laden chips from the bark-free chips on the basis of their light transmittance. An apparatus for separating wood chips according to their bark content, comprising a light source, a light detector, means for properly orienting the wood chips between the light source and detector, and means for differentiating between bark-laden chips and bark-free chips on the basis of their light transmittance.